Unlock instant, AI-driven research and patent intelligence for your innovation.

A Calculation Method for Connection Inductance of Static Var Generator

A technology of static var and connected inductance, which is applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., and can solve problems such as no theoretical calculation basis

Inactive Publication Date: 2016-06-08
NR ELECTRIC CO LTD +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the parameter selection of SVG connection inductance is from the perspective of harmonics and economy, and the per unit value of inductance is 0.2-0.5, and there is no actual theoretical calculation basis.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Calculation Method for Connection Inductance of Static Var Generator
  • A Calculation Method for Connection Inductance of Static Var Generator
  • A Calculation Method for Connection Inductance of Static Var Generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The invention provides a method for calculating the connection inductance of a static var generator, combining image 3 Shown is the single-phase equivalent diagram of the SVG access system, where U s is the system bus voltage, U r is the SVG output fundamental wave voltage, L is the connection inductance, Q is the SVG output power, assuming U s and U r The phase difference between them is δ. For SVG, δ generally does not exceed 3°, that is, cosδ≈1. The analysis and calculation are as follows:

[0021] (1) SVG output fundamental wave voltage U r :

[0022] U r = m U dc 2 2

[0023] Among them, m is the modulation ratio, U dc is the DC side voltage of the st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for calculating the connection inductance of a static var generator. The static var generator includes three connection inductances, a DC capacitor and six valve units, wherein the six valve units are connected in series in pairs. The three series branches formed are then connected in parallel; one end of the three connected inductors is respectively connected to one phase of the system bus, and the other end is respectively connected to the connection points of the two valve units in the aforementioned three series branches; and the DC capacitor is connected in series with the aforementioned three The branches are connected in parallel; the calculation method includes the steps of: determining the modulation ratio of the static var generator at no load; determining the modulation ratio of the static var generator outputting the maximum reactive power; inductance value. This method provides a practical basis for theoretical calculations and has high design guiding significance for the lack of empirical value selection of the connection inductance parameters of the current high-voltage and large-capacity static var generator.

Description

technical field [0001] The invention belongs to the field of high-power electric electronics, in particular to a method for calculating the connection inductance of a static var generator in the field of high-voltage and large-capacity static var generators. Background technique [0002] Static var generator (SVG, StaticVarGenerator) technology is a development direction of dynamic var compensation technology, because of its small size, large volume ratio, ideal output characteristics, continuous adjustment, fast response speed, and small compensation capacity affected by system voltage And other advantages, it has become a research focus of relevant institutions at home and abroad. [0003] figure 1 It is a schematic diagram of a high-voltage and large-capacity static var generator. The static var generator includes three connected inductors, DC capacitors and six valve units. Each valve unit is composed of a certain number of power devices directly connected in series. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 黄华陈赤汉张磊刘磊李成博
Owner NR ELECTRIC CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com